Improvement in lock-hinges



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THE GRAPHIC C(LPHOTO -LITH.39 8141 PARK PLAGLNY UNITED STATES PATENTOrrron.

JOHN AIKMAN, OF NORWICH TOWNSHIP, OXFORD COUNTY, CANADA.

IMPROVEMENT IN LOCK-HINGES.

Specification forming part of Letters Patent No. 164,4 [0, dated June15, 1875 application filed May 5, 1875.

To all whom it may concern:

Be it known that I, JoHN AIRMAN, of the township of Norwich, in thecounty of Oxford, in the Province of Ontario, in the Dominion of Canada,farmer, have invented certain Improvements in Hinges for OutsideWindow-Blinds, Barn-Doors, Gates, &c., of which the following is aspecification:

My invention relates to a self-acting hinge, so constructed that thewindow-blind can be opened from the outside only, and, when opened, isheld in its place by the action of the hinge without holders orfasteners on the walls, as are now used, as will be hereinafter fullydescribed and definitely claimed.

Figure l is a sectional plan view of the hinge, showing the window-blindclosed. Fig. 2 is a sectional plan view of the hinge with thewindow-blind open, and Fig. 3 shows detail views of the lever detachedfrom the hinge.

Letter A, frame of the window; B, frame or stile of window-blind; O,bottom part of hinge; D, upper part of hinge; E, the pivot or pintle onwhich the upper part of the hinge works on the lower part; F, adetachable lever or latch, working in the upper part of hinge on thepivot or pintle E; Ur, shoulder on the lower part of hinge O, to checkthe lever or latch F in the slot H; H, the slot in the lower part ofhinge, into which the lever or latch F drops against the shoulder G,when the blind is opened back; I, catch or holder on inside ofwindow-frame to receive the lever or latch F, and to hold the blindshut.

For the purposes of window outside blinds the hinge is fastened with thelower part to the window-frame, and the upper part to the stile or frameof the window-blind, the detachable lever or latch F passing through thestile of the blind. When the blind is closed the lever or latch passesinto the holder 1. Thus the blind is held shut.

To open the blind, lift the lever or latch F out of the holder I, andwhen it is back the lever or latch F drops in the slot H, is checked bythe shoulder G, and is held open.

To close the window-blind, lift the lever or latch out of the slot H anddraw the blind in. In either case the fasteuings are secure andreliable.

The advantages claimed for this hinge are as follows, namely: As theupper and lower part of the hinge, in combination with the lever orlatch, works upon alevel bearing, there is no occasion to lift up, pressback, or draw to the blind to open or close it, as is the case with theblind fastening now in use; and, also, there is no occasion to reach outof the window to the fasteners on the wall in opening or closing theblind, as the whole process ot'opening or closing the blind is done fromthe inside by means of the lever or latch in the stile of the blind.This hinge is also adapted to barn-doors or gates. For them it isattached in the same way as before described for window-blinds, but hasa rod or wire attached .to the end of the lever or latch, and connectedwith the thumb-latch, so that it can be lifted out of the holder (on theinside of the frame) in order to open the door; and the door openingback, the lover or latch falls into the slot in the hinge, and is heldopen, as before described.

In all cases the hinge is only used right and left hand, to suit thedouble blinds or doors on the lower part of the frame, the upper hingebeing the ordinary hinge now in use.

What I claim as my invention, and desire to secure by Letters Patent, is

1. The detachable lever or latch F, working in the hinge on the pivot orpintle E, and fitting through the stile of the blind B, in combinationwith the holder or catch I on the window-frame, substantially as shownand described.

2. The slot H in the lower part of the hinge O, in combination with thedetachable lever or latch F and the shoulder Gr, all operating togethersubstantially as and for the purposes above set forth.

JOHN AIKMAN. Witnesses:

JOHN H. YOUNG, J OHN HENDRY.

